Spring boot 请求Https 接口的SSL完美解决

package com.common.utils;

import javax.annotation.Nullable;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.net.HttpURLConnection;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;

public class HttpsUtils {

    /**
     * 设置单个连接的SSL 实例类型
     * @param connection 连接
     * @param instance 实例类型 TLSv1, TLSv2, SSL
     */
    public static void setSSLContext(HttpURLConnection connection, String instance) {
        if (connection instanceof HttpsURLConnection) {
            setSslContext((HttpsURLConnection) connection, instance);
        }
    }

    /**
     * 设置单个连接的SSL 实例类型
     * @param connection https 连接
     * @param instance 实例类型 TLSv1, TLSv2, SSL
     */
    public static void setSslContext(HttpsURLConnection connection, String instance) {
        try {
            connection.setSSLSocketFactory(buildSslFactory(instance));
        } catch (NoSuchAlgorithmException | KeyManagementException e) {
            e.printStackTrace();
        }
    }

    private static SSLSocketFactory buildSslFactory(String instance) throws NoSuchAlgorithmException, KeyManagementException {
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }

            public void checkClientTrusted(X509Certificate[] chain, String authType) {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) {
            }
        }};
        javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext.getInstance(instance);
        sc.init(null, trustAllCerts, null);
        return sc.getSocketFactory();
    }

    /**
     * 设置全局默认SSL 实例类型
     * @param instance 实例类型
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     */
    public static void setDefaultTrustAllHttpsCertificates(@Nullable String instance) throws NoSuchAlgorithmException, KeyManagementException {
        instance = instance == null ? "SSL" : instance;
        HttpsURLConnection.setDefaultHostnameVerifier((str, session) -> true);
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }

            public void checkClientTrusted(X509Certificate[] chain, String authType) {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) {
            }
        }};
        javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext.getInstance(instance);
        sc.init(null, trustAllCerts, null);
        javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    }
}

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